DE9114949U1 - Kit of a module field frame for roof and facade integration of photovoltaic modules, flat collectors and elements for transparent thermal insulation - Google Patents

Description

The invention relates to a kit of a module field frame for roof and facade integration of photovoltaic modules, flat collectors and elements for transparent thermal insulation.

Photovoltaic modules or laminates, flat collectors and elements for transparent thermal insulation (hereinafter referred to as modules) are used for the electrical or thermal use of solar energy. Several individual modules are generally combined to form a module field. The individual modules are electrically connected to one another or connected by means of piping.

To date, such modules have been installed on self-supporting frames made of angle profile material (L, T or U profiles) in almost all applications (with the exception of transparent thermal insulation). On flat roofs, these frames are positioned using a stand. On pitched roofs, the frames are usually mounted on roof hooks parallel to the roof covering.

In both cases, the module field represents a new additional building area. The modules and all connecting components (screw connections and wiring or piping) are exposed to direct weathering. The "mounted" system can have a detrimental effect on the aesthetics of the building.

Integrating the modules into existing or future building exteriors eliminates these disadvantages. Roof loads are not increased by integrated systems, and the requirements of statics and storm safety are easier to meet.

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The fastening concepts for modules currently available on the market are not suitable for the production of building-enclosing and weather-resistant cold roofs and cold facades. This is understandable, since such modules have not previously been designed as part of buildings. Attempts to integrate conventional framed modules into the roof have led to unsatisfactory solutions.

The invention is based on the task of ensuring the tightness and safety of the building’s outer shell made up of modules. The drainage of the condensate that forms in cold roofs or cold facades - here made up of modules - is a problem, as is the reliable ventilation and cooling of the modules.

Furthermore, the invention is intended to enable uncomplicated and rapid assembly of the modules, whereby the fulfillment of all relevant installation regulations must be ensured.

In addition, the integration process should achieve a durability appropriate to the value and technical lifespan of the modules.

These problems are solved according to the invention by a kit for a module field frame for roof and facade integration of modules.

The kit consists of at least two posts fastened vertically to roof battens or the like or an external wall and at least two bars attached horizontally to the posts, whereby the actual number of posts and bars depends on the number of modules to be integrated. The modules are embedded stress-free within the posts and bars using sealing profiles. At the edge of the module field, the flashing is integrated in the same way between sealing profiles as a transition to the adjacent roof or facade skin. This creates a permanent, wind and rainproof building enclosure area from the module field frame, modules and flashing.

In one embodiment of the invention, the mullion and transom profile bases can be made of anodized aluminum, the flat

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NuT Consulting and Research Company · 2075Hcisbüttel Telephone 040/605 00 29, Fax 040/6050029, Wulfsciortor Wog 33

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Post pressure rails and the transom covers can be made of rust-proof stainless steel. The cover of the horizontal module edges within the module field formed by the transom covers only protrudes slightly beyond the module surface. This means that the runoff of rainwater is only slightly hindered, and dirt and algae formation are largely avoided. There is also very little resistance to the sliding off of a layer of snow.

The transom and post profiles are ventilated throughout. Any condensation that may occur on the module edges and in the post and transom profiles, and any water that leaks in the event of damage, is drained away within the transom and post construction. When used in pitched roofs, the water at the lower edge of the module field reaches the roof covering below via transfer aprons that are not visible from the outside. When used in pitched roofs, condensation that occurs on the underside of the roof is drained away via an underlay membrane.

Further embodiments of the invention relate to the assembly of the post profiles in post receivers, which allow adjustment of the post profiles according to the construction height and position in the longitudinal direction of the post. The distance between the post profiles in the horizontal direction is determined by the module dimensions, the kit according to the invention can therefore contain an assembly template as an aid for attaching the post profiles or the post receivers.

In order to be able to use the kit for both roof and facade integration of modules, the transom profiles can be screwed into the recesses of the post profiles.

Finally, the invention makes it possible to carry out the cabling of photovoltaic generators in a weather-protected manner and in accordance with the VDEW's 'Provisional Guidelines for the Installation and Operation of Photovoltaic Systems' in channels separated by polarity.

Further embodiments of the invention relate to components or aids for facilitating the assembly of the module field frame and the modules.

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The embodiments of the invention are specified in subclaims 2 to 10.

An example of implementation shows, using drawings 1 to 8, an application of the module field frame for integrating a photovoltaic generator into a pitched roof. The individual illustrations show:

Fig. 1: View of an assembled and equipped module field frame

Fig. 2: Application example: Section through the structure of a pitched roof

Fig. 3: Recesses in the post profiles, mounting brackets

Fig. 4: Connection of transom and post profiles

Fig. 5: Post profile with two modules

Fig. 6: Post profile with module and protection

Fig. 7: Transom profile with two modules

Fig. 8: Transom profile with module and locking

A rafter or truss roof facing south and inclined at least 20 degrees is designed as a cold roof according to DIN 18338. Fig. 2 shows a cross-section through the roof structure. Above the rafters 21 is the water- and windproof sub-roof skin 22. The roof battens 24 for holding the roof skin (roof tiles or modules) are attached to counter battens 23.

The distance between the horizontal roof battens 24 specified by the roof tiles of the adjacent roof covering can also be maintained within the module field. The top and bottom roof battens within the module field may be placed a maximum of 20 cm from the edge of the respective module field.

Fig. 3 shows a partial view of a post. The total length of the post profiles 2 (and thus the height of the module frame) is determined by the number of modules 7 lying on top of each other. There are recesses in the top sides of the post profiles 2 to accommodate the transom profiles 3.

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Sealing profiles 14 are inserted into the upper edges of the two profile legs. Special sealing moldings 15 are inserted into the recesses. An auxiliary profile strip 12 is inserted in the middle of the profile. This strip holds the upper sealing profile 14, guides the facade construction screw 13 and thus enables the post pressure rails to be installed quickly and easily on the post profiles 2.

The post profiles 2 are mounted in post supports 8 aligned according to position and height on the horizontal roof battens 24. The supports 8 are fastened with two wood screws each. The posts 2 are fastened in the supports 8 by both side legs of the supports in the side surfaces of the post profile. Blind rivets or through-bolts are used for this purpose.

The number of supports 8 to be provided per post 2 corresponds to the number of bars 3 arranged one above the other. The supports should preferably be placed near the recess for the bar profiles.

The outer profile legs of the posts 2 and bars 3 on the edge of the module field frame have no recesses and are equipped with special sealing profiles 16. This compensates for the difference between the module thickness and the material thickness of the reinforcement 4, 5, 6.

At the lower end of each post, a water transfer apron 19 is installed between the post profile 2 and the receiver 8. This transfer apron guides the condensate escaping from the profiles under the lower protection 4 to the row of roof tiles located under the module field.

The bar profile sections 3 are shown in Fig. 4. One of the profile legs can contain a cutout for a junction box on PV modules 7 or for the cable feedthrough. This cutout is located on the upper leg of the profile during assembly (the module is therefore mounted with the junction box facing downwards). Modules with junction boxes further away from the edge can be mounted as desired. The cutout is omitted. Holes with a grommet are provided at a suitable location for the cable feedthrough.

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Sealing profiles 15 are inserted into the upper edges of the two profile legs of the locking profile 3.

After mounting the post profiles 2, the transom profiles 3 are inserted into the recesses of the post profiles. They can be screwed to the post profiles using two screws per support point through prepared holes.

The modules 7 are placed on the post and beam construction and are held in position during assembly by the assembly brackets 25 included in the kit. Several modules are electrically connected to form strands. The connecting cables 20 of the individual strands are laid separately according to polarity within the beam and post profiles.

To attach the modules, post pressure rails 9 are screwed onto the post profiles 2. Sealing profiles 14 are inserted between the module surface and the pressure rail 9.

On the locking profiles 3 within the module field, the module transitions are sealed watertight with butyl tape 18 and the locking cover 10. On the locking profiles 3 at the top and bottom edge of the module field, screwed locking pressure rails 11, also sealed with butyl tape 18, enable the transition to the storage 4, 6.

The flashing is the weatherproof transition from the module field to the adjacent roof covering. It is installed in the same way as the modules 7 between the sealing profiles of the outer profile legs. The side and upper flashing 5, 6 for integration into the existing or planned roof covering is to be made with adapted edge profiles, e.g. made of V2A steel sheets. A lead apron forms the lower flashing 4 as a transition to the roof covering for systems that do not end at the eaves edge of the roof.

Direct transitions to the ridge, the verge and the eaves are possible.

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r - 7 - List of reference symbols Modu1f e1drahmen 1 Post profile 2 Latch profile 3 lower custody 4 lateral storage 5 upper storage 6 module 7 Post receiver 8th Post pressure rail 9 Ri ege1cover 10 Latch pressure rail 11 Auxiliary profile 12 Facade construction screw with neoprene sealing washer V4A DIN 7976 13 Profile seal for post pressure rail 14 Profile seal for module holder 15 Profile seal for storage 16 Profile seal for latch holder 17 Butyl tape 18 Water-repellent apron 19 Cable 20 Roof rafters 21 Sealing membrane 22 Counter bar 23 Roof batten 24 Mounting brackets 25

Claims (1)

Kit of a module field frame for roof and facade integration of photovoltaic modules, flat collectors and elements for transparent thermal insulation, characterized in that that the kit consists of at least two post profiles fastened vertically to roof battens and the like or to an external wall and at least two transom profiles attached horizontally to the post profiles, whereby the modules or collectors are embedded stress-free within the profiles by means of rubber-elastic sealing profiles and the protection is integrated in the same way at the edge of the module field as a transition to the adjacent roof or facade skin. Kit according to claim 1, characterized in that the post profiles consist of a profile base and a screwed, snapped or clipped flat post pressure rail, the transom profiles consist of a profile base and a screwed or glued flat profile cover. Kit according to claim 1 to 2, characterized in that the post profiles are mounted in post supports, which allow adjustment of the post profiles according to height and position in the longitudinal direction. Kit according to claims 1 to 3, characterized in N.u.T. Consulting»· and Research Company mbH ■ 20'5HOiSbUM Telephone 040/605 OO 29. Fax 040/6050029, Wulfsclorfor Weg 33 /nature\ / and \ L technology -J that the transom profiles can be screwed to the post profiles at the intersection points. Kit according to claims 1 to 4, characterized in that the profiles may contain cutouts for special module types or connecting parts. Kit according to claims 1 to 5, characterized in that transfer aprons are attached to the lower ends of the post profiles to drain away the condensation water that accumulates in the profiles. Kit according to claims 1 to 6, characterized in that the post profiles have an auxiliary profile which Profile seals of the post pressure rail are fixed during assembly and the Make it easier to attach the screw connection. Kit according to claims 1 to 7, characterized in that the kit contains assembly aids (assembly clamps) and assembly jigs. Kit according to claims 1 to 8, characterized in. that when used to integrate photovoltaic modules or laminates N.u.T. Consulting»· andResearch GasollschaftmbH · 207&Ggr;> Ho^süühhI I 1 Telephone 040/6050029, Fax 040/6050029, Wulfsdorfer Wjg 33 &Pgr;&Igr;&Kgr; —J the connecting cables can run in profile channels separated by polarity. Kit according to claims 1 to 9, characterized in that the kit parts can be made partially or completely of corrosion-resistant material.